Issue 56

M. Ravikumar et alii, Frattura ed Integrità Strutturale, 56 (2021) 160-170; DOI: 10.3221/IGF-ESIS.56.13

Investigations on tensile fractography and wear characteristics of Al7075-Al 2 O 3 -SiC Hybrid Metal Matrix Composites routed through liquid metallurgical techniques

M. Ravikumar Department of Mechanical Engineering, R L Jalappa Institute of Technology, Bangalore (R), Karnataka, India ravikumar.muk@gmail.com H. N. Reddappa Department of Mechanical Engineering, Bangalore Institute of Technology, Bangalore, Karnataka, India reddyhn.phd@gmail.com R. Suresh* Department of Mechanical and Manufacturing Engineering, MSRUAS, Bangalore, Karnataka, India sureshchiru09@gmail.com Y. S Ram Mohan Department of Aerospace Engineering, B M S College of Engineering, 560019, Bangalore, India ysrmohan.mech@bmsce.ac.in C. R. Nagaraja, E. R. Babu Department of Mechanical Engineering, Bangalore Institute of Technology, Bangalore, Karnataka, India cnraaja@gmail.com, rajjbabu@gmail.com

A BSTRACT . The Al 2 O 3 -SiC reinforced Al7075 Metal Matrix Composite (MMCs) is fabricated through liquid metallurgical technique. Ceramic particulates were amalgamated into the aluminium alloy to achieve improved mechanical properties and wear resistance. Al-7075/Al 2 O 3 /SiC hybrid MMCs were produced by reinforcing 2%, 3%, 4% and 5% of Al 2 O 3 and 3%, 5% and 7% of SiC particles. Microstructural analysis was carried out to evaluate the uniform dispersal of reinforcing particulates within the base matrix. The output results indicate that the mechanical properties of the hybrid MMCs are enhanced by increase the wt. % of ceramic particulates. Tensile fractography results show the internal fracture structure of the tensile test specimens in which the particulates fracture and pullouts were observed. The wear characteristics of developed composites are studied using the pin-on-disc apparatus. The high wear resistance is observed at 5% Al 2 O 3 + 7% SiC reinforced MMCs.

Citation: Ravikumar, M., Reddappa, H.N., Suresh, R., Ram Mohan, Y.S., Nagaraja, C.R., Babu, E.R., Investigations on Tensile Fractography and Wear Characteristics of Al7075-Al 2 O 3 -SiC Hybrid Metal Matrix Composites Routed Through Liquid Metallurgical Techniques, Frattura ed Integrità Strutturale, 56 (2021) 160-170.

Received: 22.01.2021 Accepted: 14.03.2021 Published: 01.04.2021

Copyright: © 2021 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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